[Ernie Vitucci]

Good Morning...I don't see that you have replaced the condenser. They can cause such problems. Check the little wire from the bottom of the distributor to the upper plate area. The cover can rot and short to the case with vibration. Clean and tighten all your connections from the battery all the way to the plugs. The wire from the coil to the distributor can also be a problem if it is the original cable...Ernie in Arizona